these 4 derivations will be built:
  /nix/store/03hdgw0ng0gv7x6s9qlpkhgd7k195bbp-clan-cli-source.drv
  /nix/store/vzfh5dic0baxajh8jriansvavd4790ar-closure-info.drv
  /nix/store/y4y3p3s0ryjisvbd1n1mb5v5hx672knq-clan-cli.drv
  /nix/store/m8fhpl4w4lnpq7f4wkg9srak9zpwxx6a-check-vars.drv
error: path '/nix/store/4lpwais0r2x2w2q9fm1s3pgvjgjcjpac-check-vars' is not valid
error: Cannot build '/nix/store/m8fhpl4w4lnpq7f4wkg9srak9zpwxx6a-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/4lpwais0r2x2w2q9fm1s3pgvjgjcjpac-check-vars